M1.6 earthquake 3 km SSE of Mesa, Washington
A magnitude 1.6 earthquake struck 3 km SSE of Mesa, Washington on Fri, Aug 17, 1990, 1:24 PM PDT (20:24 UTC), 0 km (0 mi) below the surface.
A larger quake followed: M2.5 7 km SE of Walla Walla East, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.6 (Md, duration), micro
- Magnitude from
- Pacific Northwest Seismic Network
- Local time
- UTC
- 1990-08-17 20:24:18 UTC
- Depth
- -0.2 km (-0.1 mi), shallow
- Epicenter
- 46.544° N, 118.996° W
- Region
- Washington
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 0.2 km horizontally, 1.5 km in depth
- Magnitude uncertainty
- ±0.12
- Depth from
- Operator assigned
- Station coverage gap
- 139°
- Stations used
- 10
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 6 in the 30 days before it.
After
- 2.57 km SE of Walla Walla East, Washington · 13194 days ago · 1 km deep · 84 km away
- 1.815 km SSE of Prosser, Washington · 13176 days ago · 7 km deep · 72 km away
- 1.815 km SE of Prosser, Washington · 13176 days ago · 8 km deep · 71 km away
- 2.114 km SSE of Prosser, Washington · 13175 days ago · 8 km deep · 72 km away
- 1.54 km WSW of Benton City, Washington · 13168 days ago · 7 km deep · 53 km away
- 1.915 km SE of Prosser, Washington · 13157 days ago · 7 km deep · 71 km away
- 2.14 km NE of Milton-Freewater, Oregon · 13149 days ago · 17 km deep · 82 km away
Before
- 2.46 km SSW of Walla Walla East, Washington · 13200 days ago · 0 km deep · 79 km away
- 2.38 km E of Walla Walla East, Washington · 13200 days ago · 5 km deep · 82 km away
- 2.410 km ESE of Walla Walla East, Washington · 13201 days ago · 0 km deep · 86 km away
- 2.611 km SSE of Walla Walla East, Washington · 13202 days ago · 6 km deep · 87 km away
- 1.910 km WNW of Vantage, Washington · 13204 days ago · 3 km deep · 98 km away
- 1.821 km ESE of Desert Aire, Washington · 13216 days ago · 10 km deep · 52 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10264428. Read Fri, Oct 2, 2026, 3:02 PM UTC.